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From: anamax@earthlink.net
To: gcc-gnats@gcc.gnu.org
Subject: optimization/7269: Inlining may not eliminate unnecessary tests and branches.
Date: Wed, 10 Jul 2002 22:36:00 -0000	[thread overview]
Message-ID: <20020711053116.9481.qmail@sources.redhat.com> (raw)


>Number:         7269
>Category:       optimization
>Synopsis:       Inlining may not eliminate unnecessary tests and branches.
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          pessimizes-code
>Submitter-Id:   net
>Arrival-Date:   Wed Jul 10 22:36:00 PDT 2002
>Closed-Date:
>Last-Modified:
>Originator:     Andy Freeman
>Release:        gcc 3.1
>Organization:
>Environment:
Redhat 7.3
>Description:
Inlined procedures may have unnnecessary tests and branches.

Using built-in specs.
Configured with: ../gcc-3.1/configure 
Thread model: single
gcc version 3.1
>How-To-Repeat:
The -S -O3 output has a branch to a compare&branch whose behavior is invariant.  The "je .L4" should/can be "je .L1".
>Fix:
Better constant value propagation
>Release-Note:
>Audit-Trail:
>Unformatted:


             reply	other threads:[~2002-07-11  5:36 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2002-07-10 22:36 anamax [this message]
2002-10-06 21:36 Andrew Pinski
2003-02-19  9:26 ebotcazou
2003-02-19 14:56 Andy Freeman

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